Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B24—GRINDING; POLISHING
  • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
  • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
  • B24B13/0031—Machines having several working posts; Feeding and manipulating devices
  • B24B13/0037—Machines having several working posts; Feeding and manipulating devices the lenses being worked by different tools, e.g. for rough-grinding, fine-grinding, polishing
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T483/00—Tool changing
  • Y10T483/11—Tool changing with safety means
  • Y10T483/115—Guard
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T483/00—Tool changing
  • Y10T483/17—Tool changing including machine tool or component
  • Y10T483/1733—Rotary spindle machine tool [e.g., milling machine, boring, machine, grinding machine, etc.]
  • Y10T483/1736—Tool having specific mounting or work treating feature
  • Y10T483/174—Abrading wheel

Definitions

• the invention relates to a polishing machine for lenses, comprising at least a first polishing spindle with a polishing axis K and arranged on the polishing spindle tool holder for a trained as a tool first polishing plate, further comprising at least a first workpiece spindle with a rotation axis C and arranged on the workpiece spindle Workpiece holder, wherein the first workpiece spindle has a parallel to the polishing spindle alignable axis of rotation C, wherein the workpiece holder and the tool holder in the direction of a parallel to the polishing axis K arranged telescopic axis Z and in the direction of a right angle to the axis of rotation C arranged translation axis X are arranged relative to each other translationally movable further comprising at least a first tool changer for changing the tool, further comprising a work space formed from at least one wall, which during the processing of a splashing vo n polishing material spatially limited, wherein at least the work
• a processing machine for lenses from DE 10 2004 021 721 B3 is already known.
• the processing machine has two workpiece spindles and two workpiece changers, wherein the respective workpiece spindle has an axis of rotation and a pivot axis arranged at right angles to the axis of rotation.
• two polishing units, each with a polishing plate are provided, each having a bellows.
• the bellows has at the upper end an opening for receiving the respective workpiece spindle, the bellows sealingly sealing after immersion of the workpiece spindle or the workpiece drive in the polishing unit with the bellows.
• the respective bellows is open at the bottom, so that the polishing suspension can flow away.
• the tool changer is arranged outside of the working space in the part of the processing machine, which is sealed or sealed against the working space.
• DE 100 29 967 A1 describes a device for machining optical components.
• the device has two side walls, within which there is an intermediate 09.09.2008
• machining means turning and milling and possibly also grinding.
• machining coolant is supplied at best, which also serves to remove the removed material. Coolant has no setting properties.
• a hood is provided which ensures an overlapping partitioning of the working space.
• the hood is open at the bottom, so that the polishing agent can flow down into a common pan for both hoods.
• the gripper bar is arranged obliquely displaceable in the region of an opening of the tub and from below through the open bottom of the hood into the working space thus formed hineinverschiebbar.
• the tool changer is moved into the working space sealed off by the hood and is positioned outside of it during operation of the polishing machine. This is basically done so that the tool changer is not contaminated by polishing slurry.
• the invention is based on the object, a polishing machine for lenses and a method for polishing lenses 09.09.2008
• the first tool changer is at least partially disposed or positioned within the working space during operation of the polishing machine. Due to the working space, the spraying of polishing agent is spatially limited. Accordingly, the at least partially located in the working space tool changer is wetted during processing with polishing agent. With the arrangement of the tool changer within the working space of this, as well as the extent stationary tool spindle, is freely accessible to the user. Notwithstanding the known limitation of the working space to the immediate area around the workpiece and the tool around the working space according to the invention is further designed. This refinement allows the arrangement of the tool changer within the working space, so that both the workpiece spindle with the workpiece and the polishing spindle and the tool changer can be easily operated manually in the workspace directly.
• the polishing spindle and the tool are only mechanically accessible via an additional tool changer. Since the tool spindle is arranged stationary, all necessary for the tool change essential transport axes are on the side of the tool changer. These transport axes are the type and number reduced to a minimum, so that on the one hand, the structure of the tool changer and on the other hand, a partition against polishing are easily possible.
• the object is also achieved by the inventive method, namely that a polishing plate G manually in the 09.09.2008
• Polishing spindle is used, the lens is rough zonal polished over the polishing spindle by means of the polishing plate G, the polishing plate G is removed by means of the tool changer from the polishing spindle, a polishing plate F used by the tool changer in the polishing spindle and the lens on the polishing spindle by means of the polishing plate F finely zonal polished.
• the transport movement for the tool change is carried out by the tool changer.
• the polishing spindle remains stationary and completed for the tool change only a supporting axial movement in the direction of a telescopic axis Z.
• At least one polishing plate, the polishing plate G is manually changed or used for coarse processing.
• the selection of the polishing plate G takes place according to the type and shape of the lens to be polished.
• the to be used after rough polishing polishing plate F for finishing is automatically changed according to the invention. While the polishing plate G for rough machining the shape of the lens to be polished is selected, the polishing plate F for fine polishing processing for a plurality of lenses of different shape remains in the machine. The individual exchange of the polishing plate thus takes place only for the polishing plate G for rough machining.
• the first tool changer has a holding part with a left tool gripper, wherein the left tool gripper is also arranged or positioned at least partially within the working space during operation, and that the holding part has at least one further right tool gripper, which also is disposed or positioned at least partially within the working space during operation.
• Tool changer is arranged including its holding part and the two tool gripper within the working space so that it is easily and quickly accessible manually immediately after completion of the polishing process or before the start of the polishing process. Depending on the type of training of the tool changer this is not only partially, but completely arranged within the working space.
• drive motors or drive transmission elements for the tool changer or for the holding part are preferably arranged outside the working space and extend via corresponding sealing means into the working space to the holding part or tool gripper.
• the first tool changer has a pivot axis S arranged parallel to the polishing axis K and the tool changer (4) with the tool gripper or at least the tool gripper around the pivot axis S at an angle ⁇ 1 at least between a parking position PP and a position PW1 is pivotable in the tool holder.
• the pivot axis S for itself represents a simple machine axis, over which the tool gripper is pivotable by the angle ßl.
• the tool gripper can be pivoted about the pivot axis S, preferably in the opposite direction, by an angle ⁇ 2 between the parking position PP and a position PW2 in the region of the tool holder.
• the tool gripper is constructed symmetrically and, in addition to the aforementioned Verschwen- kung by the angle ßl in the counterclockwise direction can also be pivoted in the clockwise direction by the angle ß2, so that by means of a tool changer in a simple way both 09.09.2008
• Tools for tool holder or can be transported away from the tool holder can be transported away from the tool holder.
• the transport movement of the tool gripper is limited to a minimum, because it takes place substantially only about the pivot axis S, so that the respective holding part can be positioned.
• the transport movement is supplemented only by an axial stroke movement in the direction of a lifting axis W.
• the tool gripper can be arranged within the working space, without an excessive expansion of the working space would be necessary.
• the first tool changer has a parallel to the pivot axis S o parallel to the polishing axis K arranged lifting axis W and at least the holding part with the tool gripper at least between a polishing pad receiving position PA and the polishing plate from the tool holder releasing position PF in the direction of the lifting axis W is movable.
• the lifting axis W which is superimposed on the pivot axis S, the polishing plate can be easily placed on the polishing receptacle or removed from the tool receptacle.
• This lifting movement is usually a vertical lifting or lowering movement.
• the tool gripper engages in a circumferential groove provided on the polishing plate so that it is positively connected to the polishing plate with respect to the lifting movement and can remove and place the polishing plate counter to a latching force between the polishing plate and the tool holder.
• the tool holder is tiltably mounted on the first polishing spindle via a ball joint in the region of a tilt angle ⁇ and the tool holder on the 09.09,2008
• Teleskopachse Z at least between a Verkippterrorism to the Verkippwinkel ⁇ -releasing and the polishing process ensuring position PO and the tilting movement to the Verkippwinkel ⁇ at least partially limiting position PB is movable.
• the bearing via the ball joint ensures the required relative to the polishing relative movement between the polishing plate and the workpiece or lens surface.
• the inventive position PB ensures a sufficient restriction of the tilt angle, so that the polishing plate on the tool gripper or the holding part is automatically accessible or einharkbar.
• the tilting movement of the polishing plate around the ball joint brings vertical motion components of the polishing plate with it. In the position PB according to the invention these vertical motion components are no longer present due to the retracting telescopic movement of the lifting axis, so that in
• the ball joint with respect to the tilt angle ⁇ is limited at least to a tilt angle or angle of maximum 5 ° or 10 °.
• the inventive reduction of the tilt angle ensures the intervention of the tool changer or the respective tool gripper in the designated groove of the polishing plate.
• the polishing spindle has a rotatably driven, in a housing about the polishing axis K rotatably mounted sleeve and the tool holder is coupled via a bellows with the sleeve at least rotationally elastic, wherein the tool holder in 09.09.2008
• the position PB indirectly via the bellows against the sleeve and / or the housing can be applied in such a way that the tilt angle ⁇ and the tilting movement is at least partially limited or limited.
• the arranged on the sleeve bellows, which connects the quill with the polishing plate is used according to the invention as an abutment element for the polishing plate in order to restrict its freedom regarding the Verkippwinkel ⁇ .
• the quill is retracted, so that the bellows is correspondingly contracted or compressed and so far has only a very low elasticity.
• the quill or the bellows with the above-described reduced elasticity forms the stop or contact element for the tool holder, so that it is limited in terms of the tilt angle ⁇ in the freedom of movement to the aforementioned size.
• the remaining freedom of movement of the remaining tilt angle is ensured by the remaining elasticity of the bellows. This thus forms an elastic return element for the tool holder with respect to the remaining tilt angle ⁇ .
• the quill forms, so to speak, the fixed final deflection, which limits the remaining tilt angle ⁇ .
• the workpiece spindle may be mounted so as to be pivotable about a pivot axis B arranged at a right angle to the axis of rotation C.
• the pivotability about the pivot axis B brings about a superimposed pivoting movement with respect to the tilting movement of the polishing plate on the ball joint.
• the workpiece spindle-side pivot axis B is additionally provided.
• the working space is limited by a bottom wall, a plurality of side walls and a ceiling, wherein the workpiece spindle at least partially through a wall or an opening in the wall and / or through the ceiling or an opening in the Ceiling extends into the workroom.
• the side walls merge into a cylinder wall.
• the workpiece spindle according to the invention does not extend completely into the working space, so that the sealing measures necessary for sealing off the spindle and, in particular, the spindle drives are limited in order to prevent contamination by polishing agents.
• the respective polishing spindle and the respective tool changer At least the motor drives for the polishing spindles are arranged outside of the working space, so that they do not have to be individually or separately sealed against polishing agent.
• a sealing sleeve according to the invention is preferably provided of elastic material such as rubber.
• a guideway is provided, over which at least a part of the wall and / or the ceiling is guided relative to the polishing axis K in a direction perpendicular to the polishing axis K slidably. So that larger travel paths of the workpiece spindle relative to the work space or to its wall or ceiling can be ensured, a part of the ceiling or wall is slidably disposed on the guideway according to the invention. In a translational movement of the workpiece spindle or a pivoting movement with translational component of the corresponding part of the ceiling or wall along the guide track is carried, so that the remaining for the sealing sleeve motion component is significantly reduced. Thus, the longevity of the sealing sleeve is guaranteed due to the many movement cycles.
• the wall and / or the ceiling is at least partially flexible or elastic.
• it can also be designed correspondingly flexibly in the form of a bellows or also as an additional elastic, so that the 09.09.2008
• the polishing plate F is removed from the polishing spindle by means of the tool changer and the polishing plate G is inserted into the polishing spindle by means of the tool changer.
• the method according to the invention can further provide that the polishing plate G arranged in the polishing spindle is manually changed for the next lens to be polished, and then the lens is polished according to the invention.
• Figure 1 is a perspective view of a polishing machine
• Figure 2 is a perspective view of the polishing machine with working space
• Figure 3a is a perspective view of a polishing spindle and the tool changer
• Figure 3b is a sketched representation of the two positions of the workpiece changer
• FIG. 4 a shows a representation according to FIG. 3 a in the other position of the tool changer
• FIG. 4b the sketched representation of the two positions of the tool changer; 09.09.2008
• Figure 5a shows the outline of the polishing spindle with the tool holder and the polishing plate in the position PO;
• FIG. 5b shows the sketched illustration according to FIG. 5a with the tool holder in the position PB;
• Figure 6 shows the outline of the polishing spindle with the tool changer in its positions PF and PA.
• a polishing machine 1 shown in FIG. 1 has two workpiece spindles 2, 2 ', which at their respective lower end face have a workpiece holder 2.1, 2.1', which can be driven to rotate about a rotation axis C, C.
• a workpiece or a lens 7, 7' is arranged above the workpiece holder 2.1, 2.1 '.
• the respective workpiece spindle 2, 2 ', opposite to the workpiece holder 2.1, 2.1', has a drive wheel 2.2, 2.2 ', which can be connected to a respective drive motor 2.3, 2.3' via traction means (not shown).
• the respective spindle 2, 2 'and the respective motor 2.3, 2.3' are coupled via a spindle frame 2.4, 2.4 'or fixedly arranged on this.
• the respective spindle frame 2.4, 2.4 ' is pivotally mounted about a pivot bearing 2.5 about a pivot axis B on a carriage 1.1 of the polishing machine 1.
• the carriage 1.1 is translatable to the right and left in the direction of a perpendicular to the pivot axis B extending translation axis X.
• the carriage 1.1 sits on a base 1.2 of the polishing machine. 1
• polishing spindles 3, 3 ' with the associated motors 3.8, 3.8' and two tool changer 4, 4 'are provided. Both the polishing spindles 3, 3 'and their motor 09.09.2008
• the polishing spindle 3, 3 ' is stationary or stationary and has at its upper end a tool holder 3.1, 3.1', which is adjustable via a telescopic axis Z in the vertical direction parallel to the respective axis of rotation C, C of the workpiece spindle 2, 2 '. Furthermore, the respective polishing spindle 3, 3 'on a polishing axis K, K', around which the tool holder 3.1, 3.1 'is rotatable.
• a drive wheel 3.9, 3.9' is provided, which is connectable via a not shown traction means with the motor 3.8, 3.8 '.
• the tool holder 3.1, 3.1 ' is connected via a reciprocating piston or piston 3.7a and a bellows 3.6, 3.6' with a Polierpinole 3.4, 3.4 'according to FIG 5.
• the bellows 3.6, 3.6 ' represents the articulated and torsionally elastic connection between the sleeve 3.4 and the tool holder 3.1, 3.1'.
• the respective tool changer 4, 4 'in each case has a lifting axis W, W' and a pivot axis S, S '.
• the tool changer 4, 4 ' has a holding part 4.3, 4.3', which has a left and a right tool gripper 4.1, 4.2.
• the holding part 4.3, 4.3 ' is pivotable about the pivot axis S both clockwise and counterclockwise according to Figure 3b and Figure 4.
• the front side wall 5.5 has an access opening 5.8, which can be closed by an inwardly pivotable flap 5.9.
• the ceiling 5.6 or the ceiling element is displaceable within a guideway 5.7 to the right and left, so that the ceiling 5.6 can translate with a translational transverse displacement of the respective spindle 3.3 'according to the degree of freedom within the guideway also to the right and left translational.
• the respective spindle 3, 3 ' is sealingly connected to the ceiling element 5.6 via a flexible sealing sleeve 6, 6'.
• the sealing sleeve 6, 6 ' is designed to be elastic or flexible, so that the respective spindle 3, 3' relative to the ceiling element 5.6 can in particular perform pivoting movements, ie rotational movement components.
• the guideway 5.7 is straight in the area above the working space 5 and extends at both ends of the working space 5 in the region of the respective side wall 5.2, 5.3 arcuate upward, so that with a displacement of the ceiling element 5.6 to the right or left movement of a respective end face 5.6 'of the ceiling element 5.6 up or down within approximately vertically arranged end portions 5.7' of the guideway 5.7 is carried out.
• the working space 5 has within the bottom wall 5.1 on a drain for polishing agent, not shown. Within the working space 5 polishing agent is sprayed during processing.
• FIG. 3a the polishing spindle 3 and the first tool changer 4 are shown with the holding part 4.3 in the position PWl, PA.
• the tool changer 4 has a pivoting device 4.5, 4.5 'in the manner of a pivot spindle with a limited pivoting angle, at the upper end of a bellows 4.4 is provided, which is in operative connection with a pivot shaft 4.6.
• the pivot shaft 4.6 is at 89
• the pivot shaft 4.6 is the holding part 4.3 with the left tool gripper 4.1 directly with a polishing plate 3.2, which is located on the tool holder 3.1 of the polishing spindle 3, in engagement.
• the holding part 4.3 is in the change position PW1, ie the first change position on the polishing spindle 3 and at the same time in the position PA, ie in the lower position for receiving a polishing plate 3.3.
• the tool holder 3.1 is in its lower position relative to a telescopic axis Z, the pivoting movement of the tool holder 3.1 blocking position PB.
• the holding part 4.3 as shown in Figure 6 raises the polishing plate 3.3 by means of the engaged tool gripper 4.1 and thus solves this of the tool holder 3.1.
• the holding part 4.3 then pivots about the pivot axis S into the parking position PP according to FIG. 1.
• Figure 3b shows the position of Figure 3a as a schematic diagram in the top view.
• the holding part 4.3 pivots between the change position PWL of the left tool gripper 4.1 in the region of the polishing spindle 3 by the angle ßl in the parking position PP as shown in dashed lines and also to see in Figure 1.
• the left tool gripper 4.1 has an outer retaining lug 4.1a, which is elastically deformable relative to the retaining part 4.3, so that when the tool gripper 4.1 is pivoted in, an elastic or pretensioned element is obtained.
• FIG. 4 a corresponds to FIG. 3 a, wherein the holding part 4.3 is in the change position PW 2, so that the right-hand tool gripper 4.2 is positioned directly on the polishing spindle 3 in the receiving position PA.
• the right-hand tool gripper 4.2 engages the polishing plate 3.2 or engages behind it with a retaining nose 4.2a.
• the respective tool gripper 4.1 For axial lifting of the respective polishing plate 3.3, the respective tool gripper 4.1 has an edge 4.1b, which comes into abutment in a retaining groove 3.3a of the respective polishing plate 3.3, so that with respect to the axial Anhebet. Lifting movement a positive connection between the respective tool gripper 4.1 or its retaining lug 4.1a and the polishing plate 3.3 or 3.3.12 results in its retaining groove.
• FIG. 5a shows the polishing spindle 3 with a ball joint 3.7, which is movable over the sleeve 3.4 along the telescopic axis Z and about the polishing axis K, in the form of a schematic diagram in section.
• the tool holder 3.1 On the ball joint 3.7, the tool holder 3.1 is articulated. The torsionally elastic connection between the sleeve 3.4 and the tool holder 3.1 is ensured by the bellows 3.6.
• the polishing plate 3.3 is clipped on corresponding latching elements 3.1a of the tool holder 3.1 from above.
• the tool holder 3.1 with the polishing plate 3.3 is as shown by dashed lines within the Verkippwinkels ⁇ on the ball joint 3.7 freely tilt or swivel.
• the ball joint 3.7 is arranged on the end face of a reciprocating piston or piston 3.7a, wherein the piston 3.7a within the sleeve 3.4 in the direction of the telescopic axis Z is axially adjustable. This axial adjustment is a 09.09.2008
• Rotational movement of the sleeve 3.4 superimposed within a housing 3.5 is rotatably mounted via bearings 3.5a within the housing 3.5.
• the sleeve 3.4 is sealed by a housing part 3.4a frontally.
• the housing part 3.4a has a circumferential sealing element 3.4b.
• the piston 3.7a and the ball joint 3.7 or the tool holder 3.1 are in the position PB blocking the tilt angle ⁇ .
• the bellows 3.6 is contracted so that its elasticity is greatly reduced. Since the tool holder 3.1 is connected directly to the bellows 3.6 sealing and torsionally elastic, the freedom of movement of the tool holder 3.1 with respect to the ball joint 3.7 and the tilt angle ⁇ is limited by the now contracted and so far still limited elastic bellows 3.6 to a minimum.
• the bellows 3.6 forms due to its reduced elasticity an elastic return element with respect to the neutral or horizontal position of the tool holder 3.1 or the Verkippwinkels ⁇ , while the sleeve 3.4 forms the end rash.
• the tool changer 4 is shown in addition to the polishing spindle 3 as a schematic diagram.
• the holding part 4.3 is located in the position PA that receives the polishing plate 3.3 from the tool holder 3.1, ie moves vertically downwards in one direction.
• the tool gripper 4.1 is engaged via its retaining lug 4.1a and the edge 4.1b according to FIG. 4a with the polishing plate 3.3 or its retaining groove 3.3a.
• the tool changer 4 has the pivot shaft 4.6, about the bearing 4.7a within a housing 4.7 to the 09.09.2008
• Swivel axis S is rotatably mounted.
• a reciprocating piston or piston 4.8 in the direction of the lifting axis W translationally displaceable and rotationally fixed.
• the lifting movement of the holding part 4.3 between the polishing pad 3.3 of the polishing spindle 3 receiving position PA and the polishing plate 3.3 releasing position PF takes place via the piston 4.8.
• the pivoting movement between the parking position PP and the respective change position PW1, PW2 according to FIG. 3b and FIG. 4b is effected by the pivot shaft 4.6.
• the piston 4.8 and the pivot shaft 4.6 are closed by a bellows 4.9 to the pivot shaft 4.6 toward sealing.
• the quill 3.4 of the polishing spindle 3 is sealingly closed over the housing part 3.4a relative to the polishing spindle 3.5.
• This is sealed via a housing part 4.6a relative to the changer housing 4.7.
• the housing part 4.6a has a circumferential sealing element 4.6b.
• polishing plate F 3.3a holding groove

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Applications Claiming Priority (2)

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• 2007
  • 2007-09-10 DE DE102007042667A patent/DE102007042667A1/de not_active Withdrawn
• 2008
  • 2008-09-10 EP EP08803956A patent/EP2195140B1/fr active Active
  • 2008-09-10 WO PCT/EP2008/061989 patent/WO2009034104A2/fr active Application Filing
  • 2008-09-10 US US12/733,602 patent/US8460062B2/en active Active
  • 2008-09-10 AT AT08803956T patent/ATE542636T1/de active

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